{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["machine or equipment", "biomedical", "engineering feature", "manufacturing process", "material", "application"], "input": "The heat treatment was conducted in the B2 + O ( HT1 ) and B2 + α2 + O ( HT2 ) phase field to obtain different microstructural characteristics ."}
{"machine or equipment": [], "biomedical": [], "engineering feature": [], "manufacturing process": ["heat treatment"], "material": ["O"], "application": []}